I'm sure this oil plug only applies to the later 261s which also had the larger 1/2" oil lines. Earlier 261s had only the bypass filter as did the 235s. There may be more info in Tech tips re. modifying your 235/261 for full flow filtering.


It's easier to get forgiveness than permission!
1946 1/2-Ton Chevy
1953 Chevy 3/4-ton Factory Stakebed